'''GSM''', ([http://en.wikipedia.com/wiki/GSM Global System for Mobile communications]) is the phone standard and network type supported by the [[Neo1973]]. Future phones may support other standards.

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{{Languages|GSM}}

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'''GSM''', ([http://en.wikipedia.com/wiki/GSM Global System for Mobile communications]) is the phone standard and network type supported by the [[Neo1973]] and [[GTA02]]. Future phones may support other standards.

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GSM covers making phone calls, sending '''SMS''' text messages, and access to Internet via '''GPRS'''. A '''SIM''' ([http://en.wikipedia.org/wiki/Subscriber_Identity_Module Subscriber Identity Module]) card is given along the contract with an [[operator]], and the customer inserts the card in the phone to authorize it for use other than emergency dialling. The card is plastic (approximately 15mm*23mm*1mm) with 8 electrical contacts on. It's main purpose is identifying for the phone, the relationship between the contractor and the operator. This includes information about the mobile phone number, the home network, sms center phone number etc. The user (i.e. phone) usually has some amount of storage available on the card for a simple phonebook. SIM cards are standard [http://en.wikipedia.org/wiki/ISO_7816 ISO/IEC 7816] smart cards with a special SIM application on it.

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GSM covers making phone calls, sending '''SMS''' text messages, and access to Internet via '''GPRS'''. A '''SIM''' ([http://en.wikipedia.org/wiki/Subscriber_Identity_Module Subscriber Identity Module]) card is given along the contract with an [[operator]], and the customer inserts the card in the phone to authorize it for use other than emergency dialing. The card is plastic (approximately 15mm*23mm*1mm) with 8 electrical contacts on. Its main purpose is identifying for the phone, the relationship between the contractor and the operator. This includes information about the mobile phone number, the home network, sms center phone number etc. The user (i.e. phone) usually has some amount of storage available on the card for a simple phonebook. SIM cards are standard [http://en.wikipedia.org/wiki/ISO_7816 ISO/IEC 7816] smart cards with a special SIM application on it.

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The Neo1973 phone should work with any operator that has a GSM network (see [[Neo1973 compatible cellphone providers]]); it is quad-band and thus supports every frequency (850, 900, 1800, and 1900 MHz). Thus it will work in most countries, with the exception of some of the US and some other parts of the world that completely lack GSM coverage.

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The Neo1973 phone should work with any operator that has a GSM network (see [[Neo1973 compatible cellphone providers]]). However, in the current phone versions, the 850 MHz frequency needed in some areas in the Americas doesn't work. The other three frequencies and thus most areas in the world are supported: 900, 1800, and 1900 MHz. Some of the US and some other parts of the world completely lack GSM coverage.

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== Applications ==

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According to [[User:roh]] on #openmoko, the 850 band doesn't work with the current GTA01 GSM modem, because RF filter was set to 900 Mhz at GTA01. This is being worked on. This means that if you're in the Americas, there is a good chance the phone will simply not get a signal, unless you check that your provider has 1900 MHz coverage in your area. (For more on the frequencies, see [http://en.wikipedia.org/wiki/GSM_frequency_bands#GSM_frequency_usage_in_the_Americas GSM frequency usage in the Americas].) GTA02 has 2 versions, 850/1800/1900 Mhz and 900/1800/1900 Mhz version.

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Calls can be placed using the graphical [[Dialer]] or the textual [[libgsmd-tool]].

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== Applications ==

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Rest needs to be done on the command-line [[manually using GSM]] and [[manually using GPRS]], until [[gsmd]] supports more.

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A comprehensive DBus API is present to use GSM features. See [[OpenmokoFramework]] for an overview, [http://docs.freesmartphone.org docs.freesmartphone.org] for reference docs, and [[OpenmokoFramework/mdbus]] for command line utility or even [[OpenmokoFramework/mickeyterm]] for a MUXer-aware terminal program.

== Programming ==

== Programming ==

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The GSM features (including dialing, SMS, GPRS, and SIM access) will be programmed via [[gsmd]].

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The GSM features (including dialing, SMS, GPRS, and SIM access) will be implemented in [[gsmd]], and accessed using libgsmd or higher-level APIs.

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Gsmd will take care of accessing the [[GTA01 gsm modem|GSM modem]] over the serial port.

== Standards information ==

== Standards information ==

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For more, see [[Hardware:AT Commands]].

For more, see [[Hardware:AT Commands]].

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Note that the descendant of this specification is [http://www.3gpp.org/ftp/Specs/html-info/27007.htm 3GPP TS 27.007 - AT command set for User Equipment (UE)]. (Does OpenMoko support any of these newer versions?)

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Note that the descendant of this specification is [http://www.3gpp.org/ftp/Specs/html-info/27007.htm 3GPP TS 27.007 - AT command set for User Equipment (UE)]. (Does Openmoko support any of these newer versions?)

=== GSM 07.05 - Additional AT commands (SMS and CBS) ===

=== GSM 07.05 - Additional AT commands (SMS and CBS) ===

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* http://www.developershome.com/sms/

* http://www.developershome.com/sms/

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An other resource is:

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* http://www.gsm-modem.de/sms.html

=== GSM 07.10 - Multiplexing ===

=== GSM 07.10 - Multiplexing ===

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* http://www.3gpp.org/ftp/Specs/archive/07_series/07.10/0710-720.zip

* http://www.3gpp.org/ftp/Specs/archive/07_series/07.10/0710-720.zip

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{{Languages|SIM}}

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=== Getting neo1973 GTA04 GSM to recover properly after power down ===

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[[Category:Applications]]

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[[Category:Hardware]]

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There's probably a better place to put this, but I just wanted to get the information recorded quickly.

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[[Category:GSM]]

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To make your GSM wake the neo properly while suspended, per Lorn Potter on the dev list:

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Every time after you power off the gsm:

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sudo rm /dev/ttySAC0

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Every time before you power on the gsm:

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sudo mknod /dev/ttySAC0 c 204 64 -m 660

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sudo chgrp dialout /dev/ttySAC0

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== GTA01 & GTA02 GSM issues ==

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There are some [[GSM network registration]] issues, that makes some SIM cards not work on those 2 phones.

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AT commands, with extended and otherwise undocumented commands can be found at: [[Neo_1973_and_Neo_FreeRunner_gsm_modem]]

GSM covers making phone calls, sending SMS text messages, and access to Internet via GPRS. A SIM (Subscriber Identity Module) card is given along the contract with an operator, and the customer inserts the card in the phone to authorize it for use other than emergency dialing. The card is plastic (approximately 15mm*23mm*1mm) with 8 electrical contacts on. Its main purpose is identifying for the phone, the relationship between the contractor and the operator. This includes information about the mobile phone number, the home network, sms center phone number etc. The user (i.e. phone) usually has some amount of storage available on the card for a simple phonebook. SIM cards are standard ISO/IEC 7816 smart cards with a special SIM application on it.

The Neo1973 phone should work with any operator that has a GSM network (see Neo1973 compatible cellphone providers). However, in the current phone versions, the 850 MHz frequency needed in some areas in the Americas doesn't work. The other three frequencies and thus most areas in the world are supported: 900, 1800, and 1900 MHz. Some of the US and some other parts of the world completely lack GSM coverage.

According to User:roh on #openmoko, the 850 band doesn't work with the current GTA01 GSM modem, because RF filter was set to 900 Mhz at GTA01. This is being worked on. This means that if you're in the Americas, there is a good chance the phone will simply not get a signal, unless you check that your provider has 1900 MHz coverage in your area. (For more on the frequencies, see GSM frequency usage in the Americas.) GTA02 has 2 versions, 850/1800/1900 Mhz and 900/1800/1900 Mhz version.

Personal tools

GSM covers making phone calls, sending SMS text messages, and access to Internet via GPRS. A SIM (Subscriber Identity Module) card is given along the contract with an operator, and the customer inserts the card in the phone to authorize it for use other than emergency dialling. The card is plastic (approximately 15mm*23mm*1mm) with 8 electrical contacts on. It's main purpose is identifying for the phone, the relationship between the contractor and the operator. This includes information about the mobile phone number, the home network, sms center phone number etc. The user (i.e. phone) usually has some amount of storage available on the card for a simple phonebook. SIM cards are standard ISO/IEC 7816 smart cards with a special SIM application on it.

The Neo1973 phone should work with any operator that has a GSM network (see Neo1973 compatible cellphone providers); it is quad-band and thus supports every frequency (850, 900, 1800, and 1900 MHz). Thus it will work in most countries, with the exception of some of the US and some other parts of the world that completely lack GSM coverage.